/* ============================================================
   personal.css — Liber's personal design system
   ------------------------------------------------------------
   Body      : Barlow
   Headings  : Bricolage Grotesque
   Icons     : Material Symbols Rounded  (<span class="ico">home</span>)
   Palette   : Macintosh default 16-colour (accents only)
   Themes    : pure white (light) / pure black (dark), hairlines, flat cards

   USE:
     <link rel="stylesheet" href="personal.css">
     <script src="theme-toggle.js" defer></script>
     Toggle button:  <button class="theme-toggle" data-theme-toggle>
                        <span class="ico">light_mode</span><span data-theme-label>Light</span>
                      </button>
     Icons:  <span class="ico">calendar_month</span>   (add .fill to solid, .a-red etc. to tint)
   Distinct from the iOi house style on purpose — personal pages should be recognisable at a glance.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Barlow:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Bricolage+Grotesque:opsz,wght@12..96,600;12..96,700;12..96,800&family=Material+Symbols+Rounded:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200&display=swap');

:root{
  /* Macintosh default 16-colour palette */
  --mac-white:#FFFFFF; --mac-yellow:#FBF305; --mac-orange:#FF6403; --mac-red:#DD0907;
  --mac-magenta:#F20884; --mac-purple:#4700A5; --mac-blue:#0000D3; --mac-cyan:#02ABEA;
  --mac-green:#1FB714; --mac-dgreen:#006412; --mac-brown:#562C05; --mac-tan:#90713A;
  --mac-lgrey:#C0C0C0; --mac-grey:#808080; --mac-dgrey:#404040; --mac-black:#000000;

  --font-body:"Barlow",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-head:"Bricolage Grotesque",var(--font-body);
  --font-icon:"Material Symbols Rounded";
  --font-mono:ui-monospace,SFMono-Regular,Menlo,monospace;

  --radius:12px; --radius-sm:8px; --maxw:900px;
}

/* ---- theme tokens ---- */
:root,[data-theme="light"]{
  --bg:#FFFFFF; --ink:#000000; --muted:#7c7c7c;
  --line:rgba(0,0,0,.14); --line-strong:rgba(0,0,0,.28); --hi:rgba(0,0,0,.05);
  --link:var(--mac-blue); --link-hover:var(--mac-purple);
}
[data-theme="dark"]{
  --bg:#000000; --ink:#FFFFFF; --muted:#9a9a9a;
  --line:rgba(255,255,255,.16); --line-strong:rgba(255,255,255,.32); --hi:rgba(255,255,255,.08);
  --link:var(--mac-cyan); --link-hover:var(--mac-yellow);
}
/* respect system preference before any toggle/JS runs */
@media (prefers-color-scheme:dark){
  :root:not([data-theme]){
    --bg:#000000; --ink:#FFFFFF; --muted:#9a9a9a;
    --line:rgba(255,255,255,.16); --line-strong:rgba(255,255,255,.32); --hi:rgba(255,255,255,.08);
    --link:var(--mac-cyan); --link-hover:var(--mac-yellow);
  }
}

/* ---- base ---- */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);
  font-size:16px;line-height:1.62;-webkit-font-smoothing:antialiased;
  transition:background .2s ease,color .2s ease}

h1,h2,h3,h4,h5{font-family:var(--font-head);font-weight:700;line-height:1.14;letter-spacing:-.01em;margin:1.6em 0 .5em}
h1{font-weight:800;font-size:clamp(2.6rem,7vw,4.5rem);line-height:1.0;letter-spacing:-.02em;margin:.15em 0 .45em}
h2{font-size:1.8rem}h3{font-size:1.3rem}h4{font-size:1.08rem}
p{margin:0 0 1em}
a{color:var(--link);text-decoration:underline;text-underline-offset:2px;text-decoration-thickness:1px}
a:hover{color:var(--link-hover)}
small{color:var(--muted)}
hr{border:0;border-top:1px solid var(--line);margin:2em 0}
code,kbd{font-family:var(--font-mono);font-size:.9em;background:var(--hi);padding:.1em .4em;border-radius:5px}
pre{font-family:var(--font-mono);background:var(--hi);border:1px solid var(--line);
  padding:14px 16px;border-radius:var(--radius-sm);overflow:auto}
pre code{background:none;padding:0}
blockquote{margin:1.4em 0;padding:.1em 0 .1em 16px;border-left:2px solid var(--line-strong);color:var(--muted)}
ul,ol{padding-left:1.2em;margin:0 0 1em}li{margin:.2em 0}
img{max-width:100%}
table{border-collapse:collapse;width:100%;font-size:.95em}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line)}
th{font-weight:600}
::selection{background:var(--mac-yellow);color:#000}

/* ---- layout ---- */
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.topbar{position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center;
  gap:14px;padding:12px 22px;border-bottom:1px solid var(--line);background:var(--bg)}
.topbar .brand{font-family:var(--font-head);font-weight:700;font-size:16px;letter-spacing:-.01em;
  text-decoration:none;color:var(--ink)}

/* ---- theme toggle ---- */
.theme-toggle{font-family:var(--font-body);font-size:12.5px;font-weight:600;color:var(--ink);
  background:transparent;border:1px solid var(--line-strong);border-radius:999px;padding:5px 12px;
  cursor:pointer;display:inline-flex;align-items:center;gap:6px;line-height:1}
.theme-toggle:hover{border-color:var(--ink)}
.theme-toggle .ico{font-size:18px}

/* ---- cards ---- */
.card{border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;background:var(--bg)}
.card+.card{margin-top:14px}
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}

/* ---- buttons ---- */
.btn{font-family:var(--font-body);font-weight:600;font-size:14px;color:var(--ink);background:transparent;
  border:1px solid var(--line-strong);border-radius:999px;padding:7px 16px;cursor:pointer;text-decoration:none;
  display:inline-flex;align-items:center;gap:7px;line-height:1;transition:border-color .15s,background .15s,opacity .15s}
.btn:hover{border-color:var(--ink)}
.btn--solid{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn--solid:hover{opacity:.85}

/* ---- tags ---- */
.tag{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;
  padding:2px 9px;border-radius:999px;border:1px solid var(--line-strong);color:var(--ink)}

/* ---- icons: Material Symbols Rounded ---- */
.ico{font-family:var(--font-icon);font-weight:normal;font-style:normal;line-height:1;font-size:22px;
  display:inline-block;vertical-align:middle;white-space:nowrap;letter-spacing:normal;text-transform:none;
  font-variation-settings:'FILL' 0,'wght' 400,'opsz' 24,'GRAD' 0;-webkit-font-feature-settings:'liga'}
.ico.fill{font-variation-settings:'FILL' 1,'wght' 400,'opsz' 24,'GRAD' 0}
.ico.sm{font-size:18px}.ico.lg{font-size:30px}.ico.xl{font-size:44px}

/* ---- accent utilities (Mac palette) ---- */
.a-red{color:var(--mac-red)} .a-orange{color:var(--mac-orange)} .a-green{color:var(--mac-green)}
.a-dgreen{color:var(--mac-dgreen)} .a-cyan{color:var(--mac-cyan)} .a-blue{color:var(--mac-blue)}
.a-purple{color:var(--mac-purple)} .a-magenta{color:var(--mac-magenta)} .a-brown{color:var(--mac-brown)}
.a-tan{color:var(--mac-tan)} .a-grey{color:var(--mac-grey)}
.hl{background:var(--mac-yellow);color:#000;padding:.05em .3em;border-radius:4px}  /* highlighter */

/* accent border helper: <div class="card" style="border-color:var(--mac-blue)"> also works */
.lead{color:var(--muted);font-size:1.05rem;max-width:64ch}
.muted{color:var(--muted)}